Four minor bombs explode within the same hour in Egypt's Cairo

Two small bombs exploded at two Cairo metro stations early Wednesday, causing 4 injuries, while two others detonated an hour later near a Heliopolis courthouse damaging vehicles

Two small bombs exploded minutes apart in two Cairo metro stations during early morning rush hour on Wednesday, injuring at least four people, according to Al-Ahram's Arabic news website.
The double metro blasts were followed an hour later by two other bombs near a courthouse in Heliopolis, eyewitnesses and Al-Ahram's Arabic news website have reported.
The metro blasts injured three people at the Shubra station, medics and security sources said, while state TV has reported that one more person was injured at the Ghamra station.
The first blast, which took place in the northern Shubra station, was caused by an improvised bomb, interior ministry spokesman Abdel-Fattah Othman said. The second was a result of a sonic explosive placed in a rubbish bin at Ghamra station, on a different metro line.
The spokesperson denied earlier reports by metro sources and medics that four explosions had taken place at four different stations.
One of the injured in the metro station blasts is a suspect, he added.
The two improvised bombs in the upscale Heliopolis district were placed underneath two cars outside a courthouse, Al-Ahram said, adding that the blasts damaged the cars but left no injuries.
A third home-made explosive device planted in the vicinity was defused, according to Al-Ahram.
Security sources continue to comb the sites of the blasts for further explosives, the interior ministry said.
Wednesday's Cairo explosions come after weeks of relative calm following a period of frequent violence and palpable volatility.
Islamist militants had stepped up attacks in Egypt since the army's ouster of Islamist president Mohamed Morsi last July amid massive protests against his rule and an ensuing deadly crackdown on his supporters.
Former army chief Abdel-Fattah El-Sisi, who led Morsi's ouster, was sworn in as Egypt's new president earlier in June after he won a lopsided election victory.
Most of the attacks, mainly targeting security forces, had been initially focused in the sparsely populated Sinai Peninsula but eventually spilled over into other cities, including Cairo and the Nile Delta.
According to a government tally, the violence has killed at least 500, mostly policemen and troops.
Ansar Beit Al-Maqdis (Supporters of Jerusalem), an Al-Qaeda-inspired group based in Sinai, has claimed some of the deadliest attacks on security forces, including a failed assassination attempt on the interior minister in September.
It says the violence is in retaliation for the state clampdown on Islamists.
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